mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-03 04:12:10 +08:00
139 lines
3.8 KiB
C
139 lines
3.8 KiB
C
/* Target-dependent code for NetBSD/amd64.
|
||
|
||
Copyright (C) 2003, 2004, 2007 Free Software Foundation, Inc.
|
||
|
||
This file is part of GDB.
|
||
|
||
This program is free software; you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation; either version 2 of the License, or
|
||
(at your option) any later version.
|
||
|
||
This program is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with this program; if not, write to the Free Software
|
||
Foundation, Inc., 51 Franklin Street, Fifth Floor,
|
||
Boston, MA 02110-1301, USA. */
|
||
|
||
#include "defs.h"
|
||
#include "arch-utils.h"
|
||
#include "frame.h"
|
||
#include "gdbcore.h"
|
||
#include "osabi.h"
|
||
#include "symtab.h"
|
||
|
||
#include "gdb_assert.h"
|
||
|
||
#include "amd64-tdep.h"
|
||
#include "nbsd-tdep.h"
|
||
#include "solib-svr4.h"
|
||
|
||
/* Support for signal handlers. */
|
||
|
||
/* Return whether the frame preceding NEXT_FRAME corresponds to a
|
||
NetBSD sigtramp routine. */
|
||
|
||
static int
|
||
amd64nbsd_sigtramp_p (struct frame_info *next_frame)
|
||
{
|
||
CORE_ADDR pc = frame_pc_unwind (next_frame);
|
||
char *name;
|
||
|
||
find_pc_partial_function (pc, &name, NULL, NULL);
|
||
return nbsd_pc_in_sigtramp (pc, name);
|
||
}
|
||
|
||
/* Assuming NEXT_FRAME is preceded by a frame corresponding to a
|
||
NetBSD sigtramp routine, return the address of the associated
|
||
mcontext structure. */
|
||
|
||
static CORE_ADDR
|
||
amd64nbsd_mcontext_addr (struct frame_info *next_frame)
|
||
{
|
||
CORE_ADDR addr;
|
||
|
||
/* The register %r15 points at `struct ucontext' upon entry of a
|
||
signal trampoline. */
|
||
addr = frame_unwind_register_unsigned (next_frame, AMD64_R15_REGNUM);
|
||
|
||
/* The mcontext structure lives as offset 56 in `struct ucontext'. */
|
||
return addr + 56;
|
||
}
|
||
|
||
/* NetBSD 2.0 or later. */
|
||
|
||
/* Mapping between the general-purpose registers in `struct reg'
|
||
format and GDB's register cache layout. */
|
||
|
||
/* From <machine/reg.h>. */
|
||
int amd64nbsd_r_reg_offset[] =
|
||
{
|
||
14 * 8, /* %rax */
|
||
13 * 8, /* %rbx */
|
||
3 * 8, /* %rcx */
|
||
2 * 8, /* %rdx */
|
||
1 * 8, /* %rsi */
|
||
0 * 8, /* %rdi */
|
||
12 * 8, /* %rbp */
|
||
24 * 8, /* %rsp */
|
||
4 * 8, /* %r8 .. */
|
||
5 * 8,
|
||
6 * 8,
|
||
7 * 8,
|
||
8 * 8,
|
||
9 * 8,
|
||
10 * 8,
|
||
11 * 8, /* ... %r15 */
|
||
21 * 8, /* %rip */
|
||
23 * 8, /* %eflags */
|
||
22 * 8, /* %cs */
|
||
25 * 8, /* %ss */
|
||
18 * 8, /* %ds */
|
||
17 * 8, /* %es */
|
||
16 * 8, /* %fs */
|
||
15 * 8 /* %gs */
|
||
};
|
||
|
||
static void
|
||
amd64nbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
|
||
{
|
||
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
||
|
||
/* Initialize general-purpose register set details first. */
|
||
tdep->gregset_reg_offset = amd64nbsd_r_reg_offset;
|
||
tdep->gregset_num_regs = ARRAY_SIZE (amd64nbsd_r_reg_offset);
|
||
tdep->sizeof_gregset = 26 * 8;
|
||
|
||
amd64_init_abi (info, gdbarch);
|
||
|
||
tdep->jb_pc_offset = 7 * 8;
|
||
|
||
/* NetBSD has its own convention for signal trampolines. */
|
||
tdep->sigtramp_p = amd64nbsd_sigtramp_p;
|
||
tdep->sigcontext_addr = amd64nbsd_mcontext_addr;
|
||
tdep->sc_reg_offset = amd64nbsd_r_reg_offset;
|
||
tdep->sc_num_regs = ARRAY_SIZE (amd64nbsd_r_reg_offset);
|
||
|
||
/* NetBSD uses SVR4-style shared libraries. */
|
||
set_solib_svr4_fetch_link_map_offsets
|
||
(gdbarch, svr4_lp64_fetch_link_map_offsets);
|
||
}
|
||
|
||
|
||
/* Provide a prototype to silence -Wmissing-prototypes. */
|
||
void _initialize_amd64nbsd_tdep (void);
|
||
|
||
void
|
||
_initialize_amd64nbsd_ndep (void)
|
||
{
|
||
/* The NetBSD/amd64 native dependent code makes this assumption. */
|
||
gdb_assert (ARRAY_SIZE (amd64nbsd_r_reg_offset) == AMD64_NUM_GREGS);
|
||
|
||
gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x86_64,
|
||
GDB_OSABI_NETBSD_ELF, amd64nbsd_init_abi);
|
||
}
|